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Enable floating-point coprocessor on reset.

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Always enable the floating-point coprocessor with full access on
reset, allowing usage of hard-fp toolchains.
This commit is contained in:
Daniel Serpell 2012-08-22 00:05:08 -04:00 committed by Nicolas Schodet
parent 584052c28c
commit e4819d3cd2
1 changed files with 5 additions and 0 deletions
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5
lib/stm32/f4/vector.c
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@ -18,6 +18,8 @@
* along with this library. If not, see <http://www.gnu.org/licenses/>. * along with this library. If not, see <http://www.gnu.org/licenses/>.
*/ */
#include <libopencm3/stm32/f4/scb.h>
#define WEAK __attribute__ ((weak)) #define WEAK __attribute__ ((weak))
/* Symbols exported by the linker script(s): */ /* Symbols exported by the linker script(s): */
@ -224,6 +226,9 @@ void reset_handler(void)
__asm__("MSR msp, %0" : : "r"(&_stack)); __asm__("MSR msp, %0" : : "r"(&_stack));
/* Enable access to Floating-Point coprocessor. */
SCB_CPACR |= SCB_CPACR_FULL * (SCB_CPACR_CP10 | SCB_CPACR_CP11);
for (src = &_data_loadaddr, dest = &_data; dest < &_edata; src++, dest++) for (src = &_data_loadaddr, dest = &_data; dest < &_edata; src++, dest++)
*dest = *src; *dest = *src;